Anyway they appear as very small light yellowish spots and you have to look very close to see them with the naked eye for the most part. I finally got an ID on them after submitting them to www.bugguide.net 
A low power shot to give you an idea of the overall appearance of these things. The posterior of the nymph is to the upper right corner and the anterior of course lower left. Note that there are what appears to be three appendanges, for the lack of a better term, of sorts and a visbile exoskeletal formation in the middle.
Now progressively closer, we can see to the right and left of the so called appendages, eyespots. One on the left the other on the right and looking to the posterior we can now see a small lump, again for the lack of a better term. Actually this is some sort of valve. It opens and closes at irregular intervals. Probably it is used to expell gases from within the nymphs structure (phew!
)
Lastly here we are up close and personal to that valve. Also in the lower left corner an eyespot is visible. I do not know how they go about attaching themselves to the leaves. Using a sharp needle or dissecting probe, one can easily lift them from the surface of the leaf and surprisingly there is no evidence of any harm having been done to the leaf itself.
Sony DSC-P200
Zeiss Axiostar Plus
2.5X/0.06 A-Plan objective
5X/0.12 CP Achromat objective
10X/0.25 CPAchromt objective
Duel Pipe Fiber Optic Halogen Illumination
. Nice clear pics too.
